Improvement in stone pavements



J. MURPHY.

STONE-PAVEMENT.

No. 184,101. Patented NM/211876.

THE GRAPHIC ISO-PLY- 'INITED STATES PATENT OFFICE.

JOHN MURPHY, OF COLUMBUS, OHIO.

IMPROVEMENT IN STONE PAVEMENTS.

Specification forming part of Letters Patent No. 184,101, dated November 7, 1876; application filed September 2, 1876.

To all whom it may concern:

Be it known that I, JOHN MURPHY, of Columbus, county of Franklin, State of Ohio,

have invented a new and Improved Street Pavement, of which the following is a specification:

My invention consists in laying blocks of stone with interspaces, which I fill with a composition consisting of pulverized. slag, coal-tar, fresh lime, sand, and pitch.

Referring to the. drawing, A A are blocks of stone, between which are the spaces B, filled with a composition, which is made as follows: I take eighty pounds of pitch and boil it, and add twenty pounds of coal-tar,

tween the stone and allow it to cool. A pavement laid in this manner is impervious to Water, and is not acted upon by frost. The composition,.being in a measure elastic, renders the pavem ent easy to travel on, and it also deadens the sound of vehicles passing over it. It also admits of expansion by heat, and contraction by cold, without injury.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The composition herein described, for the spaces between the blocks of a stone pavement, consisting of slag, coal-tar, fresh lime, sand,-and pitch, combined in about the proportions and in the manner substantially as specified.

J OHN MURPHY. Witnesses WILLIAM E. GUERIN, A. G. HANBACK. 

